Lidar measurements of tropospheric ozone over Reunion Island: influence of the synoptic situations
Collections
Author/Creator
Author/Creator ORCID
Date
Type of Work
Department
Program
Citation of Original Publication
Randriambelo, T., J.-L. Baray, S. Baldy, A.M. Thompson, S. Oltmans, and P. Keckhut. “Lidar Measurements of Tropospheric Ozone over Reunion Island: Influence of the Synoptic Situations.” IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477) 4 (July 2003): 2311–13 vol.4. https://doi.org/10.1109/IGARSS.2003.1294425.
Rights
This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
Public Domain
Public Domain
Abstract
A tropospheric ozone lidar located at Reunion Island has provided an opportunity to investigate the daily vertical ozone distribution in the latter part of biomass burning season, during November-December 1999. The comparison with austral winter 1998 daily ozone profiles show that each daily ozone profile is very stratified with ozone enhancements (<100 ppbv) spaced at different heights within the whole free troposphere. The dynamical context of the profiles is different in comparison with the austral winter period where the effect of the subtropical jet stream is predominant. The analyses of the meteorological data show that the daily variability of ozone profiles is influenced by the movement of the synoptical situations. During the interseasonal period, multiple ozone sources including stratosphere-troposphere exchanges, convection and biomass burning contribute to tropospheric ozone at Reunion Island through sporadic events characterized by a large spatial and temporal variability.